Improvement in lubricating -compounds



, I UNrrEo' STATES I Joan. oUM'nunLAN on PATENT lMPROVEMENT- IN LU'BRlCATiNG COMPOUNDS.

Spciilcatidu lbrnii'ng part of Letters Patent No. 6,263, dated April it, 1849.

- steam-cylinders, wheels of vehicles, and machinery of all kinds, for softening hemp and 1 other fibrous substances preparatory to spinning the same, and'for other purposes; and we do hereby declare that; the following is afull and exact description of our said invention or discovery. i

The nature ofouriuvention consists in form I iug a base for the lubricating mixture by combining potash or other alkaline substance with fresh water and oil, lard or rcsiu,0r other oily, fatty, or resinous substance in such or nearly such proportions as will neutralize the alkaline properties, and then combining or mixing with the said base more fresh water and pulverized steatite orother analogous substance.

To enable others skilled in the art to make and use my invention, we proceed to describe the usual proportions of tho-several ingredients which we employ and themannerin which we prefer to compound them, to wit :7

We first dissolve common potash in hot wa ter until the specific gravity of the solution is indicated by'about 12 (twelvedcgrees) of Baums'hydrometer. Into this solution we put a quantity of quick lime equal in weight to about one-third of the potashcoutained in the solution, and boil the whole together about tifteen minutes. We then allow the insoluble matter to subside, take oft the liquid portion,

ofv the mixture to about 212 then gradually add about six gallons of water and raise the temperature to or nearly to the boiling-point of the mixture- The aboye-described process produces the base for our metallic oil. To this base we add {so slowly as not to lower the tEllillBEi'tilll? mapurposes, however,

terially) more water (about twelve gallons) until the mixture assumes a whitish, opaque appearance, and keep it at or near its boilingpoint for about two hours. We then mix with it about sixty pounds of stcatite, the stcatite being previously pulverized and mixed, and with about double it own weight of water. It when the steatite is added the union of the previous ingredients appears to be disturbed,

determined by the following test: W'heu thealkaline solution and the oil or grease have been boiled audstirred together with the six gallonsof water, as above described, the mixture or compound ought to be nearly transparent, and it litmus-paper, reduced by an acid, thou dipped in the mixture, the colorct the paper ought not to he ch -raged. lithe mixtur the paper a bluish ting-e, more oil i should be added.

To ascertain whether there an ex or grease in the mixture, we dip out A quantity and mix it with cold water. oil or grease rises to the surface, then more of the alkaline solution may be added. I most slight excess of either ingredieut of the base is not important.

The proportions of water and steaiite or other analogous substance to be added. to the base may be varied considerably, according to the use to which the mixture is to be applied,

To make metallic oil with resin, "we take two and a half gallons of the alkaline solution at 12 Baum'aud raiseits temperature to about 212 7v Fahrenheit; then add about pounds of common resin, pulverized, 'a till all the mixture becomes of the cousin curse of paste; then gradually aid about three gallons of water, boil about one hour, and then mix in about ten poundsof pulverized sieatite and three pounds of plumbago. Oil or lard, may also be used with the resin.

Instead of forming the base as abore deothers heretofore in use,

the process 'substantially as herein described, into a neutral or nearly ueutralcompound asa base for a lubricating-mixture, substantially as above described.

In testimony that the foregoing isa true specification of our said invention we have hereto set our hands this 1st day of November, in the year 1848. f i

' J OHN CUMBERLAND.

WM. W. CUMBERLAND.

In presence of-- Tnos. S. SOMMERs,

- CHAS. H. \VATERBURY. 

